Why should a bank keep any reserve?
Because it may be called on to pay certain liabilities at once and in a moment.

Why does any bank publish an account?
In order to satisfy the public that it possesses cash--or available securities--enough to meet its liabilities.

The object of publishing the account of the banking department of the Bank of England is to let the nation see how the national reserve of cash stands, to assure the public that there is enough and more than enough to meet not only all probable calls, but all calls of which there can be a chance of reasonable apprehension.
And there is no doubt that the publication of the Bank account gives more stability to the money market than any other kind of precaution would give.

Some persons, indeed, feared that the opposite result would happen; they feared that the constant publication of the incessant changes in the reserve would terrify and harass the public mind.

An old banker once told me: 'Sir, I was on Lord Althorp's committee which decided on the publication of the Bank account, and I voted against it.